Bella Swan's Sister (Jasper Hale love story)

Cassandra Swan, moves with her twin sister Isabella Swan to Forks to live with her dad, while her sister falls in love with one vampire, Edward Cullen and Cassandra falls for another vampire, Jasper Hale.
How will Charlie react when both his daughters start acting strange?

I only have claim over Cassandra the rest of the characters were created by Stephanie Meyer.
The story will be different the nomads James and Victoria don't exist and Laurent is part of the Denali coven.